2216211261 has 8 divisors (see below), whose sum is σ = 3223580064. Its totient is φ = 1343158320.

The previous prime is 2216211251. The next prime is 2216211293. The reversal of 2216211261 is 1621126122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2216211261 - 2²¹ = 2214114109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2216211251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33578926 + ... + 33578991.

It is an arithmetic number, because the mean of its divisors is an integer number (402947508).

Almost surely, 2^2216211261 is an apocalyptic number.

It is an amenable number.

2216211261 is a deficient number, since it is larger than the sum of its proper divisors (1007368803).

2216211261 is a wasteful number, since it uses less digits than its factorization.

2216211261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67157931.

The product of its digits is 576, while the sum is 24.

The square root of 2216211261 is about 47076.6530352361. The cubic root of 2216211261 is about 1303.7782120336.

Adding to 2216211261 its reverse (1621126122), we get a palindrome (3837337383).

The spelling of 2216211261 in words is "two billion, two hundred sixteen million, two hundred eleven thousand, two hundred sixty-one".